Experimental study on the removal of SO3 from coal-fired flue gas by alkaline sorbent

Selective Catalytic Reduction (SCR) system can efficiently remove NOx in coal-fired power plant, while raise SO3 concentration in the flue gas. Alkaline sorbent injection is a major approach to remove SO3. Experiments were conducted to study the SO3 absorption performance of alkaline sorbent. The SO3 absorption performance of the three alkaline sorbents was Na2CO3 > Ca(OH)2 ≈ Mg(OH)2. The ratio of SO3 absorption rate to SO2 absorption rate for...